Sheet-metal roofing strip



Feb. 18, 1930. o. DREG ER I 1,747,663

SHEET METAL ROOFING STRIP Filed Oct. 10, 1928 Oazar fl d attozumgo Patented Feb. 18, 1930 PATENT OFFICE OSCAR DREGER, OF HUNTSVILLE, ALABAMA SHEET-METAL ROOFING STRIP Application filed October. 10, 1928. Serial No. 311,577.

This invention relates to roofing and more particularly to a roofing strip formed of sheet metal and together with companion strips of a duplicate construction adapted to form a j complete roof for a building.

One object of the invention is to provide a roofing strip which may'have one side portion firmly engaged with an adjacent side portion of an adjoining strip and prevented 1 from slipping out of proper engagement with the adjoining strip.

Another object of the invention is to so form the strip that, when adjoining strips have their adjacent side portions disposed one in overlapped relation to the other, they may be interlocked and joints formed which may withstand a great deal of pressure without becoming flattened.

Another object of the invention is to allow the strips of roofing to be secured by nails and the nails completely covered by the overlapping portion of "an adjoining strlp and thereby prevent the nails from being exposed and also eliminate likelihood of rain-water or melted snow working through the roof about openings through which the nails pass.

Another obj ect. of the invention 1s to so form the roofing strips that they may be very easily assembled without the use of special tools and thereby allow the roofing to be easily and quickly laid with a minimum amount of labor.

The invention is illustrated 1n the accompanying drawing, wherein roofing strips, and v Fig. 2 is a fragmentary transverse sectional view taken on the line 22 of Fig. .1.

A roof formed invaccordance with this invention consists of a number of strips 1 which may be formed of tin, copper or any other material desired. These strips may be of any length and mayj extend the full length of the roof of a building or. may consist of short strips suitably joined in end to end relation to each other in any desired manner. Each strip of roofing is crimped longitudinally in spaced relation to one side edge to. provide an upstanding rib Figure 1 is a perspective view showing a portion of a roof formed by the improved 2 which extends at an incline towards the center of the strip, as shown clearly in Fig.

2, and has its walls 3 and& disposed in spaced but outwardly converging relation to each other. It should be noted that sharp bends are avoided at the base and outer edge of the rib so that there will be less likelihood of cracks being formed When the roofing is in use and a person walking upon the roof accidentally steps upon one of the ribs. The 00 portion 5 between the rib 2 and the adjacent side edge of the roofing sheet constitutes a flap or flange through which securing nails 6 are to be passed in order to secure the roofing strip. The other side portion of the roofing strip is bent upwardly at an incline,

as shown at 7, and then downwardly and inwardly, as shown at 8, to form an anchoring portion or flange 9" which is of such shape in cross section that it may have snug fitting engagement about the rib 2 of an adjoining roofing strip. From an inspection of Fig. 2, it will be readily seen that it downward pressure is applied by a person stepping upon the interlocked portions of ad joining strips the rib will be prevented from being bent downwardly as the adjacent side portion of the roofing. strip is firmly secured by the nails 6 and the fact that the walls 3 and 4.- of the rib are disposed in spaced relation to each other will also serve to resist downward bending of ,the rib. If the metal contracts during cold weather, the anchoring portions 9 of the strips cannot be drawn out of interlocked engagement about the ribs 2 as the downwardly bent portions 8 terminate close to the lower ends of the walls 4 of the ribs and if a pulling action is exerted the portions 8 will contact with the main portions of the roofing sheets and stop movement of the portions 8 away from the walls 4 of the ribs. Therefore, the anchoring portions ofthe strips will be prevented from moving out of proper engagement with the ribs of the sheets over which they lap and adjacent strips cannot become discon nected. The portions of the roofing strips between the ribs 2 and the anchoring portions 9 may be left flat or they may be. crimped longitudinally to form upstanding 2 v 1 1,747,ees

reinforcing ribs 10 each of which is of an inverted V shape in cross section and will add materially to the strength of the roofing strip. Since the nails 6 are completely covered, they will not be exposed and will not be liable to rust or work loose and also there will be no danger of water Working through the openings formed 'When the nails are driven into place. i 10 Having thus described the mvent on, I

claim Roofing comprising a strip crimped longitudinally in spaced relation to one side edge to form an outstanding rib leaning towards 15 the middle of the strip in overhanging rela- K tion thereto and having its spaced walls converging outwardly, the portion of the strip between said rib and the said side edge constituting an attaching flange and adapted to 20 have fasteners passed therethrough, the other side portion of the strip being-bent longitudinally to form an outstanding anchoring portion leaning away from thecentral portion of the strip and corresponding to the g cross sectional shape of said rib and adapted to straddle the rib of an adjacent roofing strip to retain the strips interlocked.

In testimony whereof I affix .my signature.

so OSCAR DREGER. [1 s.] 

